diff options
| author | Tim Gardner <tim.gardner@canonical.com> | 2011-05-24 17:13:05 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-05-25 08:39:43 -0700 |
| commit | 0ac1ee0bfec2a4ad118f907ce586d0dfd8db7641 (patch) | |
| tree | 630d3fead5040b26bfdb1328a18fc0ad3b09f88b | |
| parent | db271cf03f5fe39feab8e1b1818c0880c7290c5c (diff) | |
ulimit: raise default hard ulimit on number of files to 4096
Apps are increasingly using more than 1024 file descriptors. See
discussion in several distro bug trackers, e.g. BugLink:
http://bugs.launchpad.net/bugs/663090
https://issues.rpath.com/browse/RPL-2054
You don't want to raise the default soft limit, since that might break
apps that use select(), but it's safe to raise the default hard limit;
that way, apps that know they need lots of file descriptors can raise
their soft limit without needing root, and without user intervention.
Ubuntu is doing this with a kernel change because they have a policy of
not changing kernel defaults in userland.
While 4096 might not be enough for *all* apps, it seems to be plenty for
the apps I've seen lately that are unhappy with 1024.
Signed-off-by: Tim Gardner <tim.gardner@canonical.com>
Cc: Dan Kegel <dank@kegel.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | include/asm-generic/resource.h | 2 | ||||
| -rw-r--r-- | include/linux/fs.h | 3 |
2 files changed, 3 insertions, 2 deletions
diff --git a/include/asm-generic/resource.h b/include/asm-generic/resource.h index 587566f95f6..61fa862fe08 100644 --- a/include/asm-generic/resource.h +++ b/include/asm-generic/resource.h @@ -78,7 +78,7 @@ [RLIMIT_CORE] = { 0, RLIM_INFINITY }, \ [RLIMIT_RSS] = { RLIM_INFINITY, RLIM_INFINITY }, \ [RLIMIT_NPROC] = { 0, 0 }, \ - [RLIMIT_NOFILE] = { INR_OPEN, INR_OPEN }, \ + [RLIMIT_NOFILE] = { INR_OPEN_CUR, INR_OPEN_MAX }, \ [RLIMIT_MEMLOCK] = { MLOCK_LIMIT, MLOCK_LIMIT }, \ [RLIMIT_AS] = { RLIM_INFINITY, RLIM_INFINITY }, \ [RLIMIT_LOCKS] = { RLIM_INFINITY, RLIM_INFINITY }, \ diff --git a/include/linux/fs.h b/include/linux/fs.h index 5bb9e826019..3f9d3251790 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -23,7 +23,8 @@ /* Fixed constants first: */ #undef NR_OPEN -#define INR_OPEN 1024 /* Initial setting for nfile rlimits */ +#define INR_OPEN_CUR 1024 /* Initial setting for nfile rlimits */ +#define INR_OPEN_MAX 4096 /* Hard limit for nfile rlimits */ #define BLOCK_SIZE_BITS 10 #define BLOCK_SIZE (1<<BLOCK_SIZE_BITS) |